Oxidation & Rust Removal

Oxidation and rust stains require chemical treatment — pressure washing alone won't remove them, and too much pressure can damage the underlying surface. We use acid-based solutions to break down the stains, then rinse thoroughly to prevent surface damage.

Rust stains on concrete are common from patio furniture, planters, or metal fixtures. The rust penetrates the porous concrete surface and leaves orange or brown stains. We apply oxalic acid or similar rust removers, let them dwell for 10-15 minutes, then rinse. Old stains that have penetrated deep won't come out completely, but we can usually lighten them significantly.

“Oxidation and rust stains require chemical treatment — pressure washing alone won't remove them, and too much pressure can damage the underlying surface.”

Aluminum siding develops oxidation over time — a chalky white or gray film that dulls the surface. This is especially common on south-facing walls that get full sun. We use specialized oxidation removers that restore the original color without damaging the siding. The process is gentler than pressure washing and won't strip paint or damage the aluminum.

Hard water deposits on windows and concrete come from irrigation systems or mineral-heavy runoff. These require acid-based treatments and sometimes light abrasive work with specialized pads. Not all deposits come out completely if they've etched the glass or concrete, but we can usually restore 80-90% clarity.

AWP Exterior Cleaning handles oxidation and rust removal across Oregon and Western Washington. Properties in both states deal with similar issues — rust stains from metal fixtures, oxidation on aluminum siding, and hard water deposits from irrigation systems. Coastal properties in Western Washington see heavier salt exposure that accelerates oxidation on metal surfaces, while valley properties in Oregon deal with more mineral deposits from hard water.

Typical oxidation or rust removal costs $200-$500 depending on the extent of staining and the surface area. This service is often combined with house washing or concrete cleaning for a discounted rate. If you're seeing orange, brown, or white stains that won't come off with regular cleaning, chemical treatment is usually the solution.